天津地区覆盖层土动力学参数统计分析
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
收集天津地区近年来有代表性的具有完整土动力学参数作为实验数据的地震安全性评价报告66份,用两种统计方法按不同深度统计分析粉质黏土、黏土、粉土、砂土、淤泥质土等的实测土动力学参数,给出动剪切模量比和阻尼比平均值。选取2个典型工程场地,构建土层分析模型,进行土层地震反应分析计算。结果表明,本文得到的统计2值在天津地区具有一定的代表性和适用性,与实测值结果更为接近。对于获得原状土样困难的场地,特别是对于较薄的夹层土,可参照统计2结果进行分析计算。
The dynamic shear modulus ratio and damping ratio are two important parameters in seismic risk assessment and can directly affect the soil dynamics of engineering sites.The analysis of seismic hazards and soil layer seismic response showed that dynamic soil parameters were the key aspects that influenced the results of the analysis.In this study,66 recent seismic risk assessment reports in the Tianjin area were collected,which contained representative and complete experimental data of soil dynamics parameters.Using two statistical methods,the dynamic parameters of experimental soils in these reports(e.g.,silty clay,clay,silt,sand,silt soil,etc.)were statistically analyzed by depth and the average value of the dynamic shear modulus ratio and damping ratio.Next,the soil analysis models of two representative engineering sites(located at the Tianjin urban district and Tangu suburban district)were developed and the soil layer seismic response was calculated.The analysis showed that the two statistical values were representative and adaptable in the Tianjin area,and were more consistent with the practical measured values.Therefore,the two statistical values that were derived could be used to conduct the soil seismic response analysis for sites in which it was difficult to acquire undisturbed soil samples,especially for the thin interbed soil.
引文
[1]王绍博,丁海平.土动力参数对土层动力反应的影响[J].地震工程与工程震动,2001,21(1):105-108.WANG Shao-bo,DING Hai-ping,et al.Effect of Soil Dynamic Parameters on Seismic Responses of Soil Layers[J].Earthquake Engineering and Engineering Vibration,2001,21(1):105-108.(in Chinese)
    [2]刘必灯,王伟,于淼.西昌断陷盆地场地地震动差异分析[J].地震工程学报,2014,36(3):489-494.LIU Bi-deng,WANG Wei,YU Miao.Study on Difference of Ground Motionsin Faulted Basin of Xichang[J].China Earthquake Engineering Journal,2014,36(3):489-494.(in Chinese)
    [3]GB17741-2005工程场地地震安全性评价[S].北京:中国标准出版社,2006.GB17741-2005Evaluation of Seismic Safety for Engineering Sites[S].Beijing:China Standard Press,2006.(in Chinese)
    [4]DB001-94工程场地地震安全性评价工作规范[S].北京:地震出版社,1994.DB001-94Evaluation of Seismic Safety for Engineering Sites Work Specification[S].Beijing:Seismological Press,1994.(in Chinese)
    [5]袁晓铭,孙悦,孙静,等.常规土类动剪切模量比和阻尼比试验研究[J].地震工程与工程震动,2000,20(4):133-139.YUAN Xiao-ming,SUN Yue,SUN Jing,et al.Laboratory Experimental Study on Dynamic Shear Modulus Ratio and Damping Ratio of Soils[J].Earthquake Engineering and Engineering Vibration,2000,20(4):133-139.(in Chinese)
    [6]吕悦军,唐荣余.渤海海底土类动剪切模量比和阻尼比试验研究[J].防灾减灾工程学报,2003,23(2):35-42.LV Yue-jun,TANG Rong-yu,et al.Experimental Study on Dynamic Shear Modulus Ratio and Damping Ratio of the Soil of Bohai Seafloor[J].Journal of Disaster Prevention and Mitigation Engineering,2003,23(2):35-42.(in Chinese)
    [7]孙静.岩土动剪切模量阻尼试验及应用研究[D].哈尔滨:中国地震局工程力学研究所,2004.SUN Jing.Experiment and Application Studies on Dynamic Shear Modulus and Damping of Geotechnical Media[D].Harbin:Institute of Engineering Mechanics,China Earthquake Administration,2004.(in Chinese)
    [8]陈国兴,刘雪珠.苏南地区新近沉积土的动力特性研究[J].地下空间与工程学报,2005,1(7):1139-1142.CHEN Guo-xing,LIU Xue-zhu.Study on Dynamic Characteristics of Recently Deposited Soils in Southern Area of Jiangsu Province[J].Chinese Journal of Underground Space and Engineering,2005,1(7):1139-1142.(in Chinese)
    [9]施春花,吕悦军,彭艳菊,等.北京地区粉质粘土土动力学参数的统计分析[J].震灾防御技术,2009,4(1):69-79.SHI Chun-hua,LV Yue-jun,PENG Yan-ju,et al.Statistical Analysis of Dynamic Parameters of Silty Clay in Beijing Area[J].Technology for Earthquake Disaster Prevention,2009,4(1):69-79.(in Chinese)
    [10]史丙新,张力方,吕悦军,等.天津滨海场地土动力学参数研究[J].震灾防御技术,2010,5(3):288-298.SHI Bing-xin,ZHANG Li-fang,LV Yue-jun,et al.Research on Dynamic Parameters of Soil Site in Tianjin Coastal Area[J].Technology for Earthquake Disaster Prevention,2010,5(3):288-298.(in Chinese)
    [11]张小平,牛雪,赵安生,等.大连地区场地土动力学参数初步研究[J].中国地震,2011,23(7):280-289.ZHANG Xiao-ping,NIU Xue,ZHAO An-sheng,et al.Research on Dynamic Parameters of Soil Site in Dalian Area[J].Earthquake Research in China,2011,23(7):280-289.(in Chinese)
    [12]DB29-20-2000岩土工程技术规范[S].天津:中国建筑出版社,2000.DB29-20-2000Technical Code for Geotechnical Engineering[S].Tianjin:Chinese Architectural Press,2000.(in Chinese)

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心